Hexagonal pillar structure of heteroepitaxial titania–vanadia nanocrystal films for high performance in thermochromic and photocatalytic properties

2016 ◽  
Vol 18 (13) ◽  
pp. 9088-9101 ◽  
Author(s):  
Pei-Yin Zhou ◽  
Chih-Chia Cheng ◽  
Chi-Hsien Huang ◽  
Jem-Kun Chen
Keyword(s):  
High Performance ◽  
Photocatalytic Properties ◽  
Nanocrystal Films ◽  
Pillar Structure

We employed the mixture of Ti and V sols with various ratios to generate hexagonal pillar structure of the composites.

scholarly journals Optical quantum confinement and photocatalytic properties in two-, one- and zero-dimensional nanostructures

2018 ◽  
Vol 5 (9) ◽  
pp. 180387 ◽  
Author(s):  
T. Edvinsson
Keyword(s):  
Band Gap ◽  
High Performance ◽  
New Physics ◽  
Photocatalytic Properties ◽  
Carrier Confinement ◽  
Surface Areas ◽  
Low Dimensionality ◽  
Direct Band ◽  
Indirect Band Gap ◽  
Low Dimensional

Low-dimensional nanomaterials have been explored extensively in the last decades, partly fuelled by the new possibilities for tuning and controlling their electronic properties. In a broader perspective within catalysis, two-, one- and zero-dimensional (2D, 1D and 0D) inorganic nanomaterials represent a bridge between the selectivity of molecular catalysts and the high performance and stability of inorganic catalysts. As a consequence of the low dimensions, higher surface areas are obtained but also introduce new physics and increased tuneability of the electronic states in the nanostructured system. Herein, we derive the commonly used equations for optical transitions and carrier confinement in semiconductors and discuss their effect on the optical and photocatalytic properties of direct band and indirect band gap materials. In particular, the physical properties of the optical and photocatalytic properties of Fe 2 O 3 and ZnO will be used to exemplify the effects of the low dimensionality. Carrier confinement effects with changes in the density of states, band gap/shift of band edges will be outlined together with their effects on the tuneability of the material and their wider application as photocatalytic materials.

The Dependence of Structure, Morphology, and Photocatalytic Properties of SnO2 Nanoparticles Prepared via In Situ Hydrothermal Method on Annealing Temperature

2021 ◽  
Vol 21 (4) ◽  
pp. 2588-2594
Author(s):  
Pham Van Tuan ◽  
Le Trung Hieu ◽  
Vu Thi Tan ◽  
Tran Thi Quynh Hoa ◽  
La Quynh Nga ◽  
...  
Keyword(s):  
Water Pollution ◽  
Hydrothermal Method ◽  
High Performance ◽  
Tin Dioxide ◽  
Annealing Temperature ◽  
Sno2 Nanoparticles ◽  
Photocatalytic Properties ◽  
Structure Morphology ◽  
Photocatalytic Activities

New high-performance photocatalytic materials are required to effectively treat water pollution. The effect of annealing temperature on the photocatalytic activities of tin dioxide (SnO2) nanoparticles is investigated in this work. SnO2 nanoparticles are prepared via a hydrothermal method and annealing at various temperatures ranging from as-prepared to 900 °C. The size of SnO2 nanoparticles increases from 4 nm to 10 nm with an increase in annealing temperature. The photocatalytic properties of these nanoparticles are evaluated through the photocatalytic degradation of methylene blue under sunlight. Photocatalytic activities decrease significantly with an increase in annealing temperature due to an increase in size and a decrease in the surface area of SnO2 nanoparticles.

A core@dual-shell nanorod array with a cascading band configuration for enhanced photocatalytic properties and anti-photocorrosion

2020 ◽  
Vol 8 (7) ◽  
pp. 3726-3734 ◽  
Author(s):  
Daotong You ◽  
Chunxiang Xu ◽  
Xiangxiang Wang ◽  
Jing Wang ◽  
Wenyue Su ◽  
...  
Keyword(s):  
High Performance ◽  
Nanorod Array ◽  
Photocatalytic Properties ◽  
Nanorod Arrays ◽  
Hole Transfer

ZnO–CdS–NiOx core@dual-shell nanorod arrays with cascade electron and hole transfer between them for high-performance photocatalytic H2 production.

High-Performance Split-Gate Enhanced UMOSFET With p-Pillar Structure

2013 ◽  
Vol 60 (7) ◽  
pp. 2302-2307 ◽  
Author(s):  
Ying Wang ◽  
Hai-fan Hu ◽  
Cheng-hao Yu ◽  
Hao Lan
Keyword(s):  
High Performance ◽  
Pillar Structure

Formation of hollow porous TiO2 nanospheres via the encapsulation of CO2 nanobubbles for high-performance adsorption and photocatalysis

2020 ◽  
Vol 49 (24) ◽  
pp. 8274-8281
Author(s):  
Hack-Keun Lee ◽  
Seung-Woo Lee
Keyword(s):  
High Performance ◽  
Sol Gel ◽  
Photocatalytic Properties ◽  
Porous Tio2 ◽  
Sol Gel Process

Hollow porous TiO2 nanospheres, prepared via a sol-gel process including generation of CO2 gas, show excellent adsorption and photocatalytic properties.

Achieving direct electrophoretically deposited highly stable polymer induced CsPbBr3 colloidal nanocrystal films for high-performance optoelectronics

2021 ◽  
pp. 133809
Author(s):  
Akash Fulari ◽  
Ngoc Thanh Duong ◽  
Duc Anh Nguyen ◽  
Yongcheol Jo ◽  
Sangeun Cho ◽  
...  
Keyword(s):  
High Performance ◽  
Nanocrystal Films

A High Performance Energy Analyzer for Use in Electron Scanning Microscopy

1969 ◽  
Vol 27 ◽  
pp. 14-15
Author(s):  
A. V. Crewe ◽  
M. Isaacson ◽  
D. Johnson
Keyword(s):  
High Performance ◽  
Vertical Plane ◽  
Median Plane ◽  
Electron Gun ◽  
Uniform Field ◽  
Loss Mechanism ◽  
Electron Scanning Microscopy ◽  
Sector Type ◽  
Double Focusing ◽  
Electron Energy Loss

A double focusing magnetic spectrometer has been constructed for use with a field emission electron gun scanning microscope in order to study the electron energy loss mechanism in thin specimens. It is of the uniform field sector type with curved pole pieces. The shape of the pole pieces is determined by requiring that all particles be focused to a point at the image slit (point 1). The resultant shape gives perfect focusing in the median plane (Fig. 1) and first order focusing in the vertical plane (Fig. 2).

Vacuum System to Minimize the Specimen Contamination of High-Performance EM

1977 ◽  
Vol 35 ◽  
pp. 68-69
Author(s):  
N. Yoshimura ◽  
K. Shirota ◽  
T. Etoh
Keyword(s):  
Electron Microscope ◽  
High Speed ◽  
High Performance ◽  
High Vacuum ◽  
Vacuum System ◽  
Pump System ◽  
Pumping System ◽  
Diffusion Pump ◽  
Almost All ◽  
Cascade Type

One of the most important requirements for a high-performance EM, especially an analytical EM using a fine beam probe, is to prevent specimen contamination by providing a clean high vacuum in the vicinity of the specimen. However, in almost all commercial EMs, the pressure in the vicinity of the specimen under observation is usually more than ten times higher than the pressure measured at the punping line. The EM column inevitably requires the use of greased Viton O-rings for fine movement, and specimens and films need to be exchanged frequently and several attachments may also be exchanged. For these reasons, a high speed pumping system, as well as a clean vacuum system, is now required. A newly developed electron microscope, the JEM-100CX features clean high vacuum in the vicinity of the specimen, realized by the use of a CASCADE type diffusion pump system which has been essentially improved over its predeces- sorD employed on the JEM-100C.

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